original Patent - Ewer & Pick , Berlin | 1884 | violett bis blau schwefelhaltiger Farbstoff | Farbe | Beize | Chemie

Published by Patentinhaber: Ewer & Pick , BerlinPatent: Verfahren zur Darstellung violetter bis blauer schwefelhaltiger Farbstoffe aus den Paranitroverbindungen aromatischer AminePatentiert am: 16.02.1884P-459
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